Standard Deviation of AP Series

Standard Deviation for an Arithmetic Progression (AP) Series can be calculated using a simple formula given below:

\[{\sigma ^2} = \frac{{\left( {n + 1} \right)\left( {n – 1} \right)}}{{12}}{d^2}\]

\[\sigma = \sqrt {\frac{{\left( {n + 1} \right)\left( {n – 1} \right)}}{{12}}} \cdot d\]

where \(d\) is the common difference in a AP series.

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